An optimized integrated process for the bioleaching of a spent refinery processing catalysts

Z. Noori Felegari, B. Nematdoust Haghi, Gh Amoabediny, S. M. Mousavi, M. Amouei Torkmahalleh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Bioleaching of spent refinery processing catalysts using adapted indigenous strains of Acidithiobacillus ferrooxidans to recover Ni and Mo, and the separation of Ni from bioleaching liquor using iron magnetic nanoparticles were optimized in this study. Bioleaching optimization was performed using central composite design (CCD) method to optimize temperature (32 to 38°C), initial pH (1.5 to 2), particle size (-30 to -190μm sieve fraction) and pulp density (0.1 to 0.5%). The maximum values for Mo and Ni extraction were determined to be 62.72 and 92.34%, respectively, at 34 °C, -90.38μm sieve fraction, 0.22 % pulp density and initial pH of 1.8 under controlled pH condition. The results of bioleaching study suggest the shaking bioreactor as a suitable tool to optimize pulp density at low values for scale up purposes. The optimum pH value for Ni adsorption from synthetically made Ni solutions was found to be 8. The Ni adsorption increased with increasing temperature and the mass of the adsorbent. The percentage of Ni adsorption from a bioleaching liquor contained 30 ppm Ni and 5g/l magnetic nanoparticles was determined to be 97% after 1 hour at 34°C and pH 8. An integrated process for bioleaching of Ni and Mo from spent catalysts and adsorption of Ni using magnetic nanoparticles has been proposed in this study.

Original languageEnglish
Pages (from-to)621-634
Number of pages14
JournalInternational Journal of Environmental Research
Volume8
Issue number3
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

catalyst
adsorption
design method
bioreactor
temperature
particle size
iron
refinery
nanoparticle
pulp

Keywords

  • Acidithiobacillus ferrooxidans
  • Bioleaching
  • Central composite design
  • Spent catalysts

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

An optimized integrated process for the bioleaching of a spent refinery processing catalysts. / Noori Felegari, Z.; Nematdoust Haghi, B.; Amoabediny, Gh; Mousavi, S. M.; Amouei Torkmahalleh, M.

In: International Journal of Environmental Research, Vol. 8, No. 3, 2014, p. 621-634.

Research output: Contribution to journalArticle

Noori Felegari, Z. ; Nematdoust Haghi, B. ; Amoabediny, Gh ; Mousavi, S. M. ; Amouei Torkmahalleh, M. / An optimized integrated process for the bioleaching of a spent refinery processing catalysts. In: International Journal of Environmental Research. 2014 ; Vol. 8, No. 3. pp. 621-634.
@article{0d447a1780674774a865efe580e4d74c,
title = "An optimized integrated process for the bioleaching of a spent refinery processing catalysts",
abstract = "Bioleaching of spent refinery processing catalysts using adapted indigenous strains of Acidithiobacillus ferrooxidans to recover Ni and Mo, and the separation of Ni from bioleaching liquor using iron magnetic nanoparticles were optimized in this study. Bioleaching optimization was performed using central composite design (CCD) method to optimize temperature (32 to 38°C), initial pH (1.5 to 2), particle size (-30 to -190μm sieve fraction) and pulp density (0.1 to 0.5{\%}). The maximum values for Mo and Ni extraction were determined to be 62.72 and 92.34{\%}, respectively, at 34 °C, -90.38μm sieve fraction, 0.22 {\%} pulp density and initial pH of 1.8 under controlled pH condition. The results of bioleaching study suggest the shaking bioreactor as a suitable tool to optimize pulp density at low values for scale up purposes. The optimum pH value for Ni adsorption from synthetically made Ni solutions was found to be 8. The Ni adsorption increased with increasing temperature and the mass of the adsorbent. The percentage of Ni adsorption from a bioleaching liquor contained 30 ppm Ni and 5g/l magnetic nanoparticles was determined to be 97{\%} after 1 hour at 34°C and pH 8. An integrated process for bioleaching of Ni and Mo from spent catalysts and adsorption of Ni using magnetic nanoparticles has been proposed in this study.",
keywords = "Acidithiobacillus ferrooxidans, Bioleaching, Central composite design, Spent catalysts",
author = "{Noori Felegari}, Z. and {Nematdoust Haghi}, B. and Gh Amoabediny and Mousavi, {S. M.} and {Amouei Torkmahalleh}, M.",
year = "2014",
language = "English",
volume = "8",
pages = "621--634",
journal = "International Journal of Environmental Research",
issn = "1735-6865",
publisher = "University of Tehran",
number = "3",

}

TY - JOUR

T1 - An optimized integrated process for the bioleaching of a spent refinery processing catalysts

AU - Noori Felegari, Z.

AU - Nematdoust Haghi, B.

AU - Amoabediny, Gh

AU - Mousavi, S. M.

AU - Amouei Torkmahalleh, M.

PY - 2014

Y1 - 2014

N2 - Bioleaching of spent refinery processing catalysts using adapted indigenous strains of Acidithiobacillus ferrooxidans to recover Ni and Mo, and the separation of Ni from bioleaching liquor using iron magnetic nanoparticles were optimized in this study. Bioleaching optimization was performed using central composite design (CCD) method to optimize temperature (32 to 38°C), initial pH (1.5 to 2), particle size (-30 to -190μm sieve fraction) and pulp density (0.1 to 0.5%). The maximum values for Mo and Ni extraction were determined to be 62.72 and 92.34%, respectively, at 34 °C, -90.38μm sieve fraction, 0.22 % pulp density and initial pH of 1.8 under controlled pH condition. The results of bioleaching study suggest the shaking bioreactor as a suitable tool to optimize pulp density at low values for scale up purposes. The optimum pH value for Ni adsorption from synthetically made Ni solutions was found to be 8. The Ni adsorption increased with increasing temperature and the mass of the adsorbent. The percentage of Ni adsorption from a bioleaching liquor contained 30 ppm Ni and 5g/l magnetic nanoparticles was determined to be 97% after 1 hour at 34°C and pH 8. An integrated process for bioleaching of Ni and Mo from spent catalysts and adsorption of Ni using magnetic nanoparticles has been proposed in this study.

AB - Bioleaching of spent refinery processing catalysts using adapted indigenous strains of Acidithiobacillus ferrooxidans to recover Ni and Mo, and the separation of Ni from bioleaching liquor using iron magnetic nanoparticles were optimized in this study. Bioleaching optimization was performed using central composite design (CCD) method to optimize temperature (32 to 38°C), initial pH (1.5 to 2), particle size (-30 to -190μm sieve fraction) and pulp density (0.1 to 0.5%). The maximum values for Mo and Ni extraction were determined to be 62.72 and 92.34%, respectively, at 34 °C, -90.38μm sieve fraction, 0.22 % pulp density and initial pH of 1.8 under controlled pH condition. The results of bioleaching study suggest the shaking bioreactor as a suitable tool to optimize pulp density at low values for scale up purposes. The optimum pH value for Ni adsorption from synthetically made Ni solutions was found to be 8. The Ni adsorption increased with increasing temperature and the mass of the adsorbent. The percentage of Ni adsorption from a bioleaching liquor contained 30 ppm Ni and 5g/l magnetic nanoparticles was determined to be 97% after 1 hour at 34°C and pH 8. An integrated process for bioleaching of Ni and Mo from spent catalysts and adsorption of Ni using magnetic nanoparticles has been proposed in this study.

KW - Acidithiobacillus ferrooxidans

KW - Bioleaching

KW - Central composite design

KW - Spent catalysts

UR - http://www.scopus.com/inward/record.url?scp=84903177523&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903177523&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84903177523

VL - 8

SP - 621

EP - 634

JO - International Journal of Environmental Research

JF - International Journal of Environmental Research

SN - 1735-6865

IS - 3

ER -